__author__ = "ncll"
__data__ = "2020/11/11 16:48"
# 元祖tuple:不可变，不能修改
# index():

a = ('123', 11, 2, 1, 3, 4,1)
print(a.index(3, 1, 5))
print(a.count(1))

print(type(a))